Buster Simpson is a Seattle-based artist who has dedicated his artistic career to developing community-focused and urban environmentalist public art projects. For more than forty years he has created site-specific, agitation and propaganda works that have not only troubled neighborhoods to think about the health of their communities but also suggested local solutions to global issues. This exhibition at the Frye Art Museum features some of Simpson’s most compelling works, filled with explicit messages and rich metaphors, such as his “Hudson River Purge” (1991), a video performance in which he addresses the problem of acid rain by dropping 42 ½-pound soft limestone discs, or “antacid pills,” into the Hudson River, neutralizing the acidity of the water. This collection of Simpson’s public artwork celebrates his artistic legacy and captures the regional and global impact of his work.